Time controlled heat regulator



' Monfron o.sNEnrxER-, on cHIcAGo,-1LLINo1s,AssIdNoR 'ro rrHE POWERSREGULATOR Patented Sept. 27, 1932 iv COMPANY, or cnrcne ILLINoIs, ,ACORPORATION or ILLINOIS TIME coN'rEoLLEn HEAT REGULATOR i 5 Applicationfiled January 6, 1932. `Serial vNo.- 585,04.l.`

Y My invention relates to heat regulatingfdevices and particularly totime-controlled regulation apparatushaving novel features that will behereafter pointed out.

In various commercial manufacturing op erations it is desirable toprovide means'for insuring avdefinite heat'treatment', that is, meanswhereby a batch of'material may be raised to a predeterminedtemperature, maintained at that temperature for a definitepre-VVdetermined period, and then they temperature immediately loweredordiscontinuedr all without reliance on the. uncertainty of manualcontrol. This voperation has no relation to a process in whichtemperatures are raised to a certain point and maintained'at that pointfor a certain-period, then 'gradually raised or lowered tofanotherpointl for a defi.- nite period.V Clock-controlled* heat :regulationmechanism hasbeen used for that purpose as demonstrated by several'prior pat-v ents on; that subject. Y j

, Theconstruction under consideration'here contemplates the use of jextremely simple,v

'f rugged mechanism -'in which the action of the thermostatic motor isopposed by a lever carryingtwo, Vadjustable limitstops with aL weightfreely slidable therebetween. These stopscon'stitute the upper and lowerlimits of temperaturel adjustment. One of the stops consists of a. clockmechanism adapted for longitudinal adjustment on the arm in order to fixand maintain the upper limit of temfv perature regulation, vmeans beingprovided for attaching the weight to the clock for a period of timeequal to the j desired 4 period" of high temperature regulation. Whenthat period is completed the weight is released and allowed yto freelyslidey to its other limit of is adL regulatingapparatus constructedinaccord- Y ance with my invention. y

Y lIn the' drawing I have illustrated `a steam valve casing 10, havingavalve adapted to be moved to its seat bythe eXpansion'of a bellowscontained within the casing 11, the bellows vrbeing affected by thepressure de# veloped in thethermostatic bulb 12. These parts are allcommon and well known and are not illustrated in detail.

Expansion of thefthermostatic,bellows ormotor isresisted by the arm 13fulcrumed, through the' adjustable link 14, .on the pivot 15 carried 'asa part of the frame 16. The arm 13 is graduated or calibrated' withtemperature' readings or Votherwise as desired.

-A stop 17 isarranged on the armY and adapted to beheld in a desiredposition bymeans of the thumblsc-rew ,18. This stop serves to hx the lowtemperature limit of the' desired regulation. At a point nea-r the outerend of the arm, I provide a second `stop in the form of a frame v18 heldin adjusted position by means of thethumb screw 19, and carrying clockmechanism indicated generally by the numeral 20. The clock dial 21 isgraduated in hours and divisions thereof and under the action of themechanism tends 'to rotate clockwise. An arm or pointer 22 isnormallyfreely rotatableo'n a pivot 23 but is adapted to be fixed to the dial inany desired position by means of the pin 24. Y

A.' weight 25, having anti-friction rollers, is mounted for free slidingor rolling movementon the arm 18 and between the respective stops. Itcarries a hooked projection 26 adapted to register withl a notch 27 onthe rear Vedgeof the dial at Zero position. 4 It will be understood thatvariations in inclination such asindicated in the-dotted line positionhaveV no relationfto the time controlled elements of the parts and isdetermined wholly by theV valve position. However, theparts should besoadjusted that in a fully closed position of the valve, the arm 13 is inVanl upwardly inclined position,lso that the weight may roll away fromthe clock when permitted to do so. The regulation 1n order to insurethis result may be secured by means` of the adjustable link le.

The operation is as follows: Assuming that certain low and hightemperature limits have been determined, the stops 17 and-18 are fixedon the arm in the proper positions; assiuning also that a period of fiveanda half hours of high temperature cooking is desired. Under thosecircumstances the pointer-22 is moved to the point indicated in fulllines in the drawing and fixed to the dial in that relation by means ofthe pinf24. The workman then moves the weight 25 along the arm until thehook 26 enters the notch 27. The dial with its attached pointeris thenrotatedclockwise into the dotted line position where the arm 22 willContact the partV 26 and prevent further rotation. A This sets themechanism and with the clock 'in operation the temperature will bemaintained at the high limit while the clock mechanism is rotatingthedial in a counter-clockwise direction. When the dial reaches a pointwhere the notch27 is in vcoincidence with the'hook 26 (that is, the zeroposition) the weight willbe released and will roll downwardly intocontact with the stop 17. This will serve to change the temperature tothe predeterminedlow limit. If desired a catch 28 may be employed toretain the weight in that position against accidental displacement. i

It will be understood that the foregoing description relates to ayheating process, and

the controldescribed' is strictly a control of f an artificiallyincreased temperature, and the valve is, therefore, closed by thethermostatic motor pressurein the bellows.' If, however, the control isapplied to a cooling process where an artificial decrease intemperature` is produced, the valve is opened by'thermostatic motorpressure instead of closed as in the illustration. Thus the arminclination will bereversed and the` position of the respective stop andclock will be reversed; otherwise, therewill be no change in themechanism. j i l The device is of extremely simple construction, notsubject to' disarrangement by vibration or hard usage and adapts itselfto rather wide variationsin temperature control inthe matter of limitsand time.

I claim: v

l. In combination, a heat control valve, a frame, a thermostatic motorfor regulating the position of the valve, an arm fulcrumed on the frameand cooperating with the motor, a weight freely slidable betweenstops onthe arm and adapted to act by gravity to modify the action of themotor'tendingto move the valve, a clock mounted on the arm, andconstituting one limit stop said clock being adapted to hold the weightlin a fixed position on the arm for a predetermined interval,

and means for adjusting the position of the modify the action of themotor tending to` move the valve, and means vfor lholding' thev weightatthe .clock end Aof the arm for a predetermined time period and thendisconnecting it tofv permit it to immediately travel to the oppositeend of its limit of travel as defined'by said stop;` i l 3.In'combination, a heat controlvalve, a frame, a. thermostatic motor forregulating the position of the valve,an arm ulcrumed on the frame andcooperating with the motor, a clock mounted on the arm and adapted forbodily adjustment longitudinally of the arm, a stop at another point onsaid arm, a weight freely slidable on the arm between the stop andyclock and adapted to act by gravity to modify the action of the motortending to move the valve, and means for holding the weight at the clockendof the arm for a predetermined time period and then disconnecting itto permit it to immediately travel by gravity to the opposite endof itslimit of travel as defined by said sto Y A v 4I? In combination, a heatcontrol valve, a frame, athermostatic motor for regulating the positionof the valve, an arm fulcrumed on the frame and cooperating with themotor, a clock mounted on the arm and adapted for bodily adjustmentlongitudinally of the' arm, a stop `at another point on said arm, aweight freelyV slidable on the arm between the stop and clock andadapted to act by gravity to modify the action of the motor tending toymove the valve, and means lfor holding the V5'. In combination, a heatcontrol valve, a

thermostatic motor for regulating the position of the valve, an armcooperating with the motor, a clock mounted on the arm and acting asahigh temperature limit stop, said clock beingadjustable bodilylongitudinally of the arm, a low temperature limit stop `alsolongitudinally adjustable of the arm, a weight movable by gravitybetween said signature.

stops and adapted to act by gravity to modify the action of the motortending to move the valve, and means for holding said Weight against theclock until disconnected by motion of a time-controlled element of theclock, the position of said arm being at all times such thatWhen-disconnected from the clock the Weight will travel by gravity toits Yoppositev limit of movement.

In testimony whereof I have aiixed my MoRToN o. sNEDiKER.

